One AT&T 830 runs Lumia Camera and One does not. Whats up?

So my sister-in-law got a new 830 form AT&T a month ago, per my advice, but constantly complained about the camera. I checked it and its of course using the old Nokia Camera. I downloaded Lumia Camera to her phone but as stated in other forums, when launching Lumia Camera, it states Denim is required. This phone states it has Denim. This behavior seems to line up with the scenarios I see in the WindowsCentral forums.

Now a co-coworker also bought a new 830 a little more than a month ago. His AT&T 830 has Lumia Camera installed and working. I verified it myself. He also has a newer firmware somehow. Screen shot of working 830[

So my sister-in-law got a new 830 form AT&T a month ago, per my advice, but constantly complained about the camera. I checked it and its of course using the old Nokia Camera. I downloaded Lumia Camera to her phone but as stated in other forums, when launching Lumia Camera, it states Denim is required. This phone states it has Denim. This behavior seems to line up with the scenarios I see in the WindowsCentral forums.

Now a co-coworker also bought a new 830 a little more than a month ago. His AT&T 830 has Lumia Camera installed and working. I verified it myself. He also has a newer firmware somehow. Screen shot of working 830Attachment 109018

The Microsoft store sells the RM-985 unlocked US variant that supports AT&T and T-Mobile LTE bands. Check his extras+info and you'll know. Someone at the Microsoft store made him buy the better variant.

What Microsoft is doing now with the unlocked unbranded RM-985 Lumia 830, and did for a while with the unlocked unbranded RM-877 Lumia 1020, is something they need to go all out on from now on. Sell unlocked, unbranded, full-feature devices that work on all carriers. If a Lumia 930 that supported US LTE bands had ever been available they would probably have sold a lot of them.

The Microsoft store sells the RM-985 unlocked US variant that supports AT&T and T-Mobile LTE bands

Is that LTE just T-Mobile, or does it apply to AT&T as well? I went with the AT&T variant because I heard that the unbranded versions didn't support AT&T's LTE frequencies, and the last HSPA+ phone I used had terrible data speeds in the area where I work.

Is that LTE just T-Mobile, or does it apply to AT&T as well? I went with the AT&T variant because I heard that the unbranded versions didn't support AT&T's LTE frequencies, and the last HSPA+ phone I used had terrible data speeds in the area where I work.

This has got to be the reason, crap. She's gonna have to go with a S6 now because the 830 with Nokia Camera is much slower than a properly updated variant with Lumia Camera. This is crap. Way to go AT&T, you lost us another one.

Was going to ask if you tried Lumia Camera Classic, but it seems like I am too late. While created for "older Lumias", Lumia Camera Classic gives a similar experience to Lumia Camera 5, and something AT&T 830 owners are stuck using until AT&T gets off their butts and give us the full Denim update,.